IBM 5150 PC Technical Reference (6025005, August, 1981) (PDF)

System Board
Cassette Interface Connector Specifications 2-21
Cassette Jumpers 2-19
Cassette User Interface 2-19
Circuit Block Diagrams ( Cassette) 2-19
Component Diagram 2-13
Data Flow 2-6
5 1/4" Diskette Drive Switch Settings 2-29
I/O Address Map 2-23
I/O Channel 2-8
I/O Channel Description 2-10
I/O Channel Diagram 2-9
Keyboard 2-14
Keyboard Diagram 2-16
Keyboard Interface Block Diagram 2-15
Keyboard Interface Connector Specifications 2-18
Keyboard Scan Codes 2-17
32/64 KB Memory Expansion Option Switch Settings 2-31
Memory Switch Settings 2-30
Monitor Type Switch Settings 2-29
Speaker Drive System Block Diagram 2-22
Speaker Interface 2-22
System Memory Map 2-25
System Expansion Slots (See I/O Slots) 2-3
System Memory Map 2-25
System Memory Map (16 KB Increments) 2-26
System Unit 1-1
System Unit Power Connector 2-35
System Usage (ROM and) 3-1
T
Tab (Vertical) 2-79
T/C (Terminal Count) 2-12
Terminal Count (T/C) 2-12
THR (Transmitter Holding Register) 2-145
Timing Generator 2-48
Transmit Circuit 2-127
Transmit Data (TX) 2-127
Transmitter Holding Register (THR) 2-145
Transmitter Output and Receiver Input 2-126
Trigger Buttons 2-118
TX Data (Transmit Data) 2-127
1-19